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Photosynthesis- Light-Dependent and Light Independent Reactions- know what happens in each part of this process
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Pigments and how those are important to photosynthesis, aka understanding why plants are green, why leaves change color in the fall, etc...
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- Photosynthesis directly opposes respiration in determining how plants influence atmospheric CO2 concentrations. When a leaf is in the light, both photosynthesis and respiration are occurring simultaneously. The data in the Table were collected from the leaf of a sagebrush plant that was enclosed in a chamber that measures the rate of CO2 exchange. The same leaf was used to collect the data in Interpret the Data in Chapter 7. Respiration is shown as a negative and photosynthesis as a positive rate of CO2 exchange. The net photosynthesis rate is the amount of CO2 (in micromoles per square meter per second) assimilated by the leaf while respiration is occurring; a positive value indicates more photosynthesis is occurring than respiration. The light exposed to the leaf is quantified as the number of photons in the 400 to 700 nm wavelength, the photosynthetic photon flux density (PPFD); 2,000 mol/m2/s is equivalent to the amount of light occurring at midday in full Sun. Observation Photosynthetic Photon Flux Density (PPFD) (mol/m2/s) Net Photosynthesis (mol/m2/s) 1 2,000 9.1 2 1,500 8.4 3 1,250 8.2 4 1,000 7.4 5 750 6.3 6 500 4.8 7 250 2.2 8 0 -2.0 Why is net photosynthesis negative when PPFD is zero? Looking at the respiration data from Interpret the Data in Chapter 7, at what temperature do you think these data were collected? Source: Data based on unpublished research by Brent Ewers, University of Wyoming.Both the light reactions and light-independent reactions of photosynthesis…In photosynthesis, contrast the light reactions with the light independent reactions, in terms of goals, inputs, and outputs of each. Spatially where do they take place (which parts of the chloroplast)?
- Dark reaction of photosynthesis does not need light. Do plants undergo darkreaction at night explain.Step Input Output Light Dependent Reactions Light Independent Reactions (Dark Reactions) Write the full chemical equation for photosynthesis below: Eactors that Affect Photosynthesis Gas exchange usually results in a loss of o Desert plants have special, • Photosynthesis has an optimal and is limited by amounts of Section 3: Cellular Respiration (Aerobic Respiration) All living things need The food ( is broken down to and energy is released in the form of Write the chemical equation for cellular respiration below: Step 1: Glycolysis step process that breaks down into two smaller Results in small amounts of Does not require (anaerobic) Occurs outside Input Output © 2020 to present Keystone Sclence - All Rights Reserved www.teacherspayteochers.com/Store/Keystone-ScienceDiagram 4: The Light Reactions of Photosynthesis STROMA (low H* concentration) Cytochrome complex Photosystem I Photosystem I Light NADP reductase 4H NADP + H NADPH THYLAKOID SPACE (high H* concentration) 4 H* Thylakoid membrane ATP synthase STROMA (low H concentration) ADP Diagram 4 shows a single thylakoid membrane taken from a chloroplast inside of a the light dependent cycle that take place along the thylakoid membrane In the Thylakoid space water is split into O 02 H* and electrons O H*, ATP and O2 O Photosystem II, electrons and oxygen O 02 and chlorophyll
- . List the parts of the light reactions that are proteins. List the parts of the light reactions that are not proteins. This question is in reference to photosynthesis.Which among the following is not a raw material of light dependent reactions of photosynthesis? Light ATP+Pi NADP+ NADPHBriefly explain the light-dependent reactions of photosynthesis: where does this take place, what are the reactants and what is produced?
- In an experiment conducted on photosynthesis-CO2 update and photosynthesis-Determining rate in white light. what gas will be produce as an product of photosynthesis and if present, what will this allow the leaf dice to do? Also, what will be the goal of photosynthesis, and how will it be different from the goal of cellular respiration?In photosynthesis, contrast the light reactions with the light independent reactions, in terms of goals, inputs, and outputs of each. Spatially where do they take place (which parts of the chloroplast)? (Optional, for further discussion: Could there be light reactions without light-independent reactions, or visa-versa?)What stages of the light-dependent reactions occur prior to the buildup of hydrogen ions in the thylakoid compartment? Select all that apply. Energy emitted by the electron transport chain triggered by PSII generates a hydrogen ion gradient across the thylakoid membrane. PSII pulls replacement electrons from water molecules, which then break apart into oxygen atoms and hydrogen ions. A photosystem II (PSII) absorbs light energy and releases an electron. Electrons released from PSII enter an electron transport chain in the thylakoid membrane. A flow of hydrogen ions causes ATP synthase to phosphorylate ATP.